Click here for production status of specific part numbers. Evaluates: MAX13053A MAX13053A Shield General Description Quick Start The MAX13053A Shield is a fully assembled and tested Required Equipment PCB that demonstrates the functionality of the MAX13053A MAX13053A Shield fault-protected with extended common mode input range 5V, 500mA DC power supply and 25kV ESD Human Body Model (HBM) controller area network (CAN) transceiver. The shield features a Signal/function generator digital isolator, used as a level translator (between the Oscilloscope controller and the transceiver) and operates from a range of 1.71V to 5.5V supply. Procedure 1) Place the MAX13053A Shield on a nonconductive Features surface to ensure that nothing on the PCB gets Integrated Protection Increases Robustness shorted to the workspace. 65V Fault Tolerant CANH and CANL 2) Set the jumpers of JU1, JU2, JU CANH, and JU 25kV ESD HBM (Human Body Model) CANL to 2-3 position. 25V Extended Common Mode Input Range (CMR) 3) Place two shunts on JU8 Transmitter Dominant Timeout Prevents CAN Bus a. Shunt pins 4-5 to connect TXD signal to D0 of J6. Lockup b. Shunt pins 2-3 to connect RXD signal to D1 of J6. Short-Circuit Protection 4) Shunt S U1 and GND on JU12, 1-2 position. Thermal Shutdown 5) Place shunts on JU3, JU10, JU15, and JU20, 1-2 Family Provides Flexible Design Options position. Silent Mode Enables/Disables Transmitter 6) Verify that all jumpers are in their default position as 1.62V to 5.5V Logic-Supply (VL) Range shown in Table 1. 7) With +5V power supply disabled, connect the High-Speed Operation of Up to 2Mbps positive terminal to VCC EXT, VL EXT, and IOREF Operating Temperature Range of -40C to +125C in test points. Connect the negative terminal to the 8-pin SOIC Package GND test point. 8) Connect the positive terminal of the function generator to D1 of J6 and negative terminal to any GND test points on the shield. 9) Turn on the +5V DC Power Supply. 10) Set Function generator to output a 250KHz square wave between 0V and 5V, and then enable function generator output. Ordering Information appears at end of data sheet. 11) Connect oscilloscope probes on CANH and CANL to GND test points of the Shield. Verify the difference voltage between CANH and CANL matches TXD input signal. The difference voltage should be between 1.5V-3V in dominant mode and -120mV to 12mV in recessive mode. 12) Connect an oscilloscope probe on D0 of J6 and verify the RXD output signal matches the TXD input signal. 319-100222 Rev 0 7/18Evaluates: MAX13053A MAX13053A Shield board is evaluated in a system and is connected at the end Detailed Description of Hardware of the cable, then select the 120 (60-60) termination. The MAX13053A Shield is a fully assembled and tested The termination resistors on the MAX13053A Shield should circuit board for evaluating the MAX13053A fault- be changed to a 60 with optional footprint for a 100pF protected high speed CAN transceiver (U1) with 65V load, to simulate a complete system load during evaluation. of fault protection. The Shield is designed to evaluate CANH and CANL can also be left unloaded. MAX13053A alone or in a CAN system. The MAX13053A Shield enables Mbed or Arduino platform to communicate TXD and RXD Configuration on a CAN bus. Digital channel assignments for TXD and RXD are selected through JU8. It consists of three columns, and 14 rows. Powering the Board The columns labeled TXD and RXD are connected to The MAX13053A Shield requires one power supply for 5V INA1 and OUTA1 pins on of the MAX14932FASE+ (U2), operation. The power supply can come from an external respectively. The middle column is the digital I/O pins, supply or the Arduino/Mbed microcontrollers 5V supply. D0 to D15. This provides flexibility for the user to select To select the external supply, shunt the JU1 VDD pin to different resources on the microcontroller for transmitting VDD EXT pin option, 2-3 default position. To connect the and receiving signals to and from the CAN transceiver. Arduino/Mbed 5V supply to VDD, shunt JU1 VDD pin to Table 2 shows the list of JU8 jumper options. 5V, 1-2 position. Similarly, the VL supply is selected using JU2. Shunt JU2 to 2-3 position to select the external Silent Mode supply from a range of 1.62V to 5.5V. Shunt JU2 to 1-2 Drive S pin high to place the MAX13053A in silent mode. position to select the Arduino/Mbed 5V supply. Refer to This disables the transmitter regardless of the voltage Table 1 for jumper settings. level at TXD. However, RXD is still active and monitors activity on the bus line. On-Board Termination A properly terminated CAN bus is terminated at each end DB9 Connector with the characteristic impedance of the cable. For CAT5 or The MAX13053A Shield has a DB9 connector to CANH CAT6 cables, this is typically 120 on each end for a 60 and CANL (pins 7 and 2, respectively). load on the CAN driver. The MAX13053A Shield features a selectable 60 load and a 60-60 split termination SD Card circuit between the CANH and CANL driver outputs. The The MAX13053A Shield has a SD Card socket. The Micro 60-60 split termination has a footprint for a capacitor to SD card is connected to D10-D13 to interface with Arduino/ reduce high frequency noise and common mode drift. If the Mbed board via SPI. The user can store CAN messages. Table 1. Table Jumper Settings JUMPER SHUNT POSITION DESCRIPTION 1-2 Connects 120 between CANH and CANL JU CANH and 2-3* Connects 60 between CANH and CANL JU CANL Open No load is connected between CANH and CANL 1-2 VDD is shorted to 5V supply JU1 2-3* VDD is shorted to VDD EXT supply Open VDD is open 1-2 VL is shorted to 5V supply JU2 2-3* VL is shorted to VDD EXT supply Open VL is open JU3 1-2* Connects VL to U1 Pin 5 JU8 - Refer to TXD and RXD Configuration 1-2 Connects S pin to D7 JU9 Open* Disconnects S pin from D7 Maxim Integrated 2 www.maximintegrated.com